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ESTIMATION OF GENETIC DISTANCE AMONG BREEDS WITH DIFFERENT
COAT COLOR BY BLOOD BIOCHEMICAL POLYMORPHISM IN PIGS

D. Y. Lin(1), J. S. Chao(2), M. H. Chang(2), C. J. Lee(1), S. C. Wu(1), J. L. Tzeng(1),
L. Lee(2), H. L. Chang(1) and M. C. Wu(1)

(1)Taiwan Livestock Research Institute
(2)National Laboratory Animal Breeding and Research Center

Genetic variation and distance on blood biochemical polymorphism among breeds of pigs: black Lanyu in conservation, black Lanyu in selection, brown-white stripping Mitsae (derived from hybrid of Duroc and Lanyu), and white Landrace raised at Taitung Breeding Animal Propagation Station of Taiwan Livestock Research Institute, were estimated. Blood samples of pigs from above four breeds were collected from jugular vein and there 45, 29, 30 and 28 head, respectively. Three plasma proteins consisting of amylase-1 (AMY1), amylase-2 (AMY2) and esterase (ES) and two erythrocyte enzymes: glucose phosphate isomerase (GPI) and 6-phosphogluconate dehydrogenase (PGD) were typed in cellulose acetate electrophoresis. Lanyu in selection had monophasic GPI and PGD. Lanyu in conservation had monophasic GPI. Heterozygosities of Landrace, Mitsae, Lanyu in selection, and Lanyu in conservation were 0.42„b0.05 (Standard error), 0.46„b0.07, 0.31„b0.13 and 0.31„b0.12. Genetic distances among the above four breeds were estimated and there was a close distance (0.004) between Lanyu in selection and Lanyu in conservation as compared to others. Estimation was 0.018 for Landrace and Lanyu in conservation; 0.013 for Landrace and Lanyu in selection; 0.253 for Landrace and Mitsae; 0.465 for Mitsae and Lanyu in selection; and 0.438 for Mitsae and Lanyu in conservation. Genetic distance between black and white breeds was closer than that of between black and reddish brown breeds.

Key Words: Pig, Polymorphism, Genetic distance.